Washing method of washing machine

ABSTRACT

Disclosed herein is a washing method of a washing machine. The method comprises supplying water into the washing machine, forming an agitating water stream by rotating at least one of an inner tub and a pulsator to generate agitating force, and disentangling laundry by rotating the inner tub in one direction at a speed causing the laundry to be forced against an inner wall of the inner tub by centrifugal force while allowing water to drop down into the inner tub after being raised in the washing machine. With the method, an inner tub is rotated in one direction so as to form an alpha-shaped water stream at a laundry disentangling step in a state wherein water is supplied to a predetermined level, so that the laundry is completely forced against the inner wall of the inner tub by circumferential force, thereby enhancing washing and rinsing efficiency as well as disentangling effect.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a washing method of a washing machine,and more particularly, to a washing method of a washing machine, whichallows laundry to be disentangled by means of an alpha-shaped waterstream generated according to fast rotation of an inner tub while wateris supplied into the washing machine.

2. Description of the Related Art

FIG. 1 is a diagram illustrating a general washing machine.

The general washing machine comprises a cabinet 2 defining an appearanceof the washing machine, a door 1 provided on an upper surface of thecabinet, and a controller 4 provided to an outer surface of the cabinetto operate a washing machine and display a washing procedure.

The cabinet 2 is equipped therein with a barrel-shaped outer tub 6,which is supported via a damper 7 and is opened at an upper surfacethereof.

The outer tub 6 is connected at an upper portion to a water supplyapparatus 10 for supplying water, and is connected at a lower portion toa draining device 12 for drainage of water.

The water supply apparatus may be structured such that water flowsthrough a detergent barrel 14 located at an upper portion of the cabinet2.

A ring-shaped tub cover 5 is provided around an outer periphery of anupper end of the outer tub 6.

The outer tub 6 is provided therein with an inner tub 8, which has anopen upper surface, and a plurality of holes (not shown) formed on aperipheral surface thereof, so as to be rotated in the outer tub 6.

The inner tub 8 is provided at the bottom with a pulsator 9.

The inner tub 8 and the pulsator 9 are directly connected to a motor 20provided below the outer tub 6, and are rotated by driving force of themotor 20.

With the washing machine constructed as described above, an washingoperation is generally performed according to the following sequence; awashing process for removing contaminants stuck to laundry such asclothes, a rising process for rinsing the laundry with the contaminantsremoved therefrom, and a dewatering process for removing water from thelaundry. These processes can be selectively performed during the washingoperation by a user.

The washing process, the rinsing process, and the dewatering process inthe general washing machine will be described as follows.

FIG. 2 is a flow diagram illustrating the washing process of the generalwashing machine.

The washing process of the general washing machine will be describedwith reference to FIGS. 1 and 2.

After laundry is input to the inner tub 8, and the door 1 is closed, thewashing process is started, causing water to be supplied into the innertub 8 (S1). At this time, when detergent is contained in the detergentbarrel 14, the detergent is also supplied to the inner tub 8 togetherwith the water (S2).

After completing water supply, the inner tub 8 or the pulsator 9 isrotated for a predetermined time, generating a water stream. Then,contaminants stuck to the laundry are detached therefrom by virtue ofinteraction of the detergent and the water stream with the contaminants(S4).

After the inner tub 8 or the pulsator 9 is stopped, the inner tub 8 isrotated again at a speed lower than that of the washing step asdescribed above, thereby generating agitating force. Then, the laundryentangled during the washing step is disentangled while being agitatedby the rotation of the inner tub 8 generating the agitation force. Thedisentangling step is typically performed for one minute (S6).

Then, the water is drained from the washing machine (S8), and anunbalance degree of the inner tub 8 is detected. Here, a large unbalancedegree of the inner tub 8 results in movement of the washing machine dueto severe vibration occurring when the inner tub 8 is rotated at a highspeed, and provides a lower dewatering rate. Thus, it is necessary toprovide the step of detecting the unbalance degree of the inner tub 8(S10).

When the unbalance degree of the inner tub 8 is deviated from anacceptable degree, the disentangle step in which the inner tub 8 isrotated at the low speed to generate the agitating force while beingsupplied with water is repeated once or more until the unbalance degreeof the inner tub 8 reaches an acceptable degree. At this time, since thedetergent barrel 8 is not refilled with the detergent before the washingoperation of the laundry is finished, clean, detergent-free water issupplied thereto.

If it is determined through detection for the unbalance degree of theinner tub 8 that the unbalance degree of the inner tub 8 is theacceptable degree, a temporary dewatering step is performed (S12), inwhich the inner tub 8 is rotated at a high speed so as to force waterabsorbed in the laundry to be extracted therefrom by centrifugal force,and the washing process is completed.

Meanwhile, the rinsing process of the general washing machine isperformed with the same steps of the washing process as described above,except that, when the unbalance degree of the inner tub 8 is theacceptable degree, the dewatering process is immediately performed. Atthis time, in order to allow detergent-free rinsing water to be suppliedinto the inner tub, the detergent cannot be supplied to the detergentbarrel 8.

After the rinsing process as mentioned above, the dewatering process isperformed such that water absorbed in the laundry can be extracted bycentrifugal force, thereby allowing the laundry to be rapidly, naturallydried, and when the dewatering process is completed, the washingoperation for the laundry is completed.

However, in the washing method of the general washing machine asdescribed above, since the laundry is disentangled while the inner tub 8is rotated at the low speed to generate the agitating force, a waterstream for disentangling the laundry has a weak force, so that thelaundry is not substantially moved. In other words, since theconventional washing method does not ensure effective laundrydisentanglement, the disentangling step must be repeated several times,thereby increasing a washing time as well as energy consumption.

Additionally, if the laundry is not suitably disentangled in the innertub, infinite repetition of the disentangling step may occur.

SUMMARY OF THE INVENTION

The present invention has been made to solve the above problems, and itis an object of the present invention to provide a washing method of awashing machine, which forms a water steam for sufficientlydisentangling laundry in an inner tub.

In accordance with one aspect of the present invention, the above andother objects can be accomplished by the provision of a washing methodof a washing machine, comprising the steps of: supplying water into thewashing machine; forming an agitating water stream by rotating at leastone of an inner tub and a pulsator to generate agitating force; anddisentangling laundry by rotating the inner tub in one direction at aspeed causing the laundry in the inner tub to be forced against an innerwall of the inner tub by centrifugal force while allowing the water todrop down into the inner tub after being raised in the washing machine.

At the step of supplying water, a detergent may be selectively input tothe inner tub.

At the step of forming the agitating water stream, the laundry may bewashed by water containing the detergent, or the laundry may be rinsedwith detergent-free rinsing water.

At the step of forming the agitating water stream, the inner tub may berotated integrally with the pulsator to generate the agitating force.

At the step of disentangling the laundry, the inner tub may be rotatedat a speed of 80˜120 rpm.

At the step of disentangling the laundry, the inner tub may be rotatedintegrally with the pulsator in one direction.

The method may further comprise draining water after the step ofdisentangling the laundry.

The method may further comprise dewatering the laundry by rotating theinner tub in one direction at a speed causing water absorbed in thelaundry to be extracted by centrifugal force, after draining water.

At the step of dewatering the laundry, a rotating speed of the inner tubmay be higher than that of the inner tub at the step of disentanglingthe laundry.

The method may further comprise detecting an unbalance degree of theinner tub between the step of draining water and the step of dewateringthe laundry, and the step of dewatering the laundry may be performed ifthe unbalance degree of the inner tub is an acceptable degree.

If the unbalance degree of the inner tub is deviated from the acceptabledegree, the method may further comprise re-disentangling the laundry byrotating the inner tub in one direction at the same speed as that of thestep of disentangling the laundry while being supplied with water,followed by draining water, and re-detecting the unbalance degree of theinner tub.

At the step of re-disentangling the laundry, the inner tub may berotated together with the pulsator in one direction.

In accordance with another aspect of the present invention, a washingmethod of a washing machine is provided, comprising the steps of:supplying water into the washing machine; forming an agitating waterstream by rotating at least one of an inner tub and a pulsator togenerate agitating force; disentangling laundry by integrally rotatingthe inner tub and the pulsator in one direction at a speed causing thelaundry in the inner tub to be forced against an inner wall of the innertub by centrifugal force while allowing water to drop down into theinner tub after being raised in the washing machine; draining water;detecting an unbalance degree of the inner tub; and dewatering thelaundry by rotating the inner tub in one direction at a speed causingwater absorbed in the laundry to be extracted by centrifugal force,after draining water, if the unbalance degree is an acceptable degree.

After the step of supplying water, a detergent may be selectively inputto the inner tub.

At the step of forming the agitating water stream, the laundry may bewashed by water containing the detergent, or the laundry may be rinsedwith detergent-fee rinsing water.

At the step of disentangling the laundry, a rotating speed of the innertub may be lower than that of the inner tub at the steps of dewateringthe laundry.

If the unbalance degree of the inner tub is deviated from the acceptabledegree, the method may further comprise re-disentangling the laundry bydraining water after the inner tub and the pulsator are rotated in onedirection at the same speed as that of the step of disentangling thelaundry while water is supplied to the inner tub, and re-detecting theunbalance degree of the inner tub.

In accordance with yet another aspect of the present invention, awashing method of a washing machine is provided, comprising the stepsof: supplying water into the washing machine; forming an agitating waterstream by rotating an inner tub and a pulsator at the same time at arelatively low speed to generate agitating force in order to allowlaundry to be washed or rinsed; disentangling the laundry by integrallyrotating the inner tub and the pulsator in one direction so as togenerate an alpha-shaped water stream; draining water; detecting anunbalance degree of the inner tub; and dewatering the laundry byrotating the inner tub in one direction at a relatively high speed, ifthe unbalance degree is an acceptable degree.

At the step of disentangling the laundry, a rotating speed of the innertub may be lower than that of the inner tub at the step of dewateringthe laundry.

If the unbalance degree of the inner tub is deviated from the acceptabledegree, the method may further comprise re-disentangling the laundry,and re-detecting the unbalance degree of the inner tub.

The step of re-disentangling the laundry may comprise re-supplyingwater; re-disentangling the laundry by rotating the inner tub and thepulsator in one direction at the same speed as that of the step ofdisentangling the laundry; and draining water.

With the washing method of the washing machine according to theinvention, since the laundry is completely spread along the inner wallof the inner tub by the step of disentangling the laundry, the laundrycan be highly effectively disentangled in the inner tub.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other objects and features of the present inventionwill be more clearly understood from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIG. 1 is a diagram illustrating the structure of a general washingmachine;

FIG. 2 is a flow diagram illustrating a washing process of the generalwashing machine;

FIG. 3 is a flow diagram illustrating a washing process of a washingmachine in accordance with one embodiment of the present invention;

FIG. 4 is a diagram illustrating the step of forming an agitating waterstream of the washing method of the washing method in accordance withthe present invention;

FIG. 5 is a diagram illustrating the step of forming an alpha-shapedwater stream of the washing method of the washing machine in accordancewith the present invention;

FIG. 6 is a flow diagram illustrating a rinsing process of the washingmachine in accordance with the present invention; and

FIG. 7 is a flow diagram illustrating a rinsing process of a washingmachine in accordance with another embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Preferred embodiments of the present invention will be described indetail with reference to the accompanying drawings.

It should be noted that although various embodiments can be realizedwithin the scope of the invention, most preferred embodiments of theinvention will be described hereinafter. Meanwhile, since the structureof a washing machine is the same as that of the general washing machine,detailed description thereof will be omitted hereinafter.

A washing method of a washing machine according to one embodiment of theinvention, in which a washing process, a rinsing process, and adewatering process are sequentially performed, will be described asfollows.

FIG. 1 is a diagram illustrating the structure of a general washingmachine, FIG. 3 is a flow diagram illustrating the washing process inthe washing method of the invention, FIG. 4 is a diagram illustratingthe step of forming an agitating water stream in the washing method ofthe invention, and FIG. 5 is a diagram illustrating the step of formingan alpha-shaped water stream of the washing method of the invention.

After laundry “m” is input to an inner tub 8, and a door 1 is closed, asequence for a washing operation is input through a controller 4 suchthat the washing process, the rinsing process, and the dewateringprocess are sequentially performed. Then, the washing machine isoperated with the washing process as a first process of the washingoperation.

In the washing process, first, water is supplied into the washingmachine to a predetermined level of an inner tub according an amount oflaundry through a water supply apparatus 10. At this time, whendetergent is contained in a detergent barrel 8, the detergent can alsobe supplied into the washing machine together with the water since thedetergent in the detergent barrel 8 is washed into an outer tub 6 bywater (S50).

When water is supplied to the washing machine to the predetermined levelof the inner tub at the step of supplying water, at least one of theinner tub 8 and a pulsator 9 is rotated to generate agitating force bydriving force of a motor 20, as shown in FIGS. 1, 3 and 4.

The inner tub 8 and the pulsator 9 are directly connected to the motor20, and can be integrally rotated thereby. It is desirable that themotor 20 be rotated at a speed (for example, 110˜150 rpm) which canforce the inner tub 8 and the pulsator 9 to be rotated such that arelatively strong agitating water stream R can be produced by therotation of the inner tub 8 and the pulsator 9.

When the inner tub 8 and the pulsator 9 are rotated to generate theagitating force as described above, contaminants stuck to the laundry min the inner tub 8 are detached therefrom by means of interaction of thedetergent and the agitating water stream R with the laundry. Forreference, when the laundry is washed by means of the interaction of thedetergent and the agitating water stream R with the laundry, it will bereferred to as a washing step or the step of forming an agitating waterstream (S52).

Then, after the inner tub 8 and the pulsator 9 are rotated at a lowspeed for a predetermined time to generate the agitating force, theinner tub 8 and the pulsator 9 are stopped together with the motor 20,as shown in FIGS. 1, 2 and 3, and the step of disentangling the laundryis performed such that the laundry m entangled during the washing stepcan be disentangled.

At the step of disentangling the laundry, the inner tub 8 is rotated inone direction at a speed which allows the laundry m within the inner tub8 to be completely forced against an inner wall of the inner tub 8.

Additionally, at this step, the inner tub 8 is rotated in one directionat a speed, that is, a speed of forming an alpha-shaped water stream α,which allows water to be dropped down into the inner tub 8 by means of atub cover 5 provided at an upper end of the outer tub 6 after beingraised along an outer wall of the inner tub 8 between the outer tub 6and the inner tub 8 by centrifugal force.

At this time, water passes through the laundry in the inner tub 8 in acentrifugal direction.

At the step of disentangling the laundry as described above, the innertub 8 may be rotated integrally with the pulsate 9, and at this time, arotating speed of the inner tub 8 and the pulsator 9 is preferably inthe range of 80 to 120 rpm. It should be noted that, at the step ofdisentangling the laundry, the rotating speed of the inner tub 8 and thepulsator 9 can be deviated from the range of 80 to 120 rpm.

Meanwhile, at the step of disentangling the laundry, since the inner tub8 is filled with water such that the laundry is sufficiently immersed inthe water, even if the inner tub 8 and the pulsator 9 are rotated in onedirection, vibration of the washing machine is not severe (S54).

After finishing the step of disentangling the laundry, the inner tub 8and the pulsator 9 are stopped, and contaminated water is drained to theoutside by a draining device 12 (S56).

After finishing the step of draining water using the draining device 12,the step of detecting an unbalance degree of the inner tub 8 isperformed in order to detect whether the laundry m is uniformly spreadin the inner tub 8 by the step of disentangling the laundry.

The step of detecting the unbalance degree is performed using varianceof load applied to the motor 20, that is, variation in driving speed ofthe motor 20, according to the unbalance degree of the inner tub 8 uponone rotation of the inner tub 8.

That is, at the step of detecting the unbalance degree, after the motor20 is driven so as to force the inner tub 8 to rotate at a relativelylow speed, an unbalance degree U of the inner tub 8 is obtained throughvariation in the driving speed of the motor 20, and is then comparedwith a predetermined unbalance reference U_(o).

At this time, the unbalance reference U_(o) is a minimum unbalancedegree, which can cause severe vibration of the washing machine when theinner tub 9 is rotated at a high speed without being supplied withwater. If the unbalance degree U of the inner tub 8 is equal to orgreater than the unbalance reference U_(o), it is determined that theunbalance degree U of the inner tub 8 is deviated from an acceptabledegree (S58).

Then, the step of re-disentangling the laundry is performed such thatthe laundry m can be further sufficiently spread in the inner tub 8.

The step of re-disentangling the laundry may comprise re-supplying waterinto the washing machine by the water supplying apparatus 10,re-disentangling the laundry with the same method as that of the step ofdisentangling the laundry as described above, and draining water via thewater draining device 12.

The step of re-forming the agitating water stream may be performedbetween the step of re-supplying water and the step of re-disentanglingthe laundry, in which both the inner tub 8 and the outer tub 9 arerotated at a low speed to generate the agitating force. The step ofre-forming the agitating water stream may be performed for a timeshorter than or the same as that of the step of forming the agitatingwater stream or the step of washing the laundry as described above(S57).

After the step of re-disentangling the laundry, the step of detecting anunbalance degree of the inner tub is performed again (S58). The step ofre-disentangling the laundry, and the step of re-detecting the unbalancedegree are preferably repeated at least once until the unbalance degreeof the inner tub 8 becomes the acceptable degree.

Meanwhile, when it is detected through the step of detecting theunbalance degree that the unbalance degree of the inner tub 8 is theacceptable degree, the inner tub 8 is rotated in one direction at aspeed higher than those of the steps of washing the laundry and ofdisentangling the laundry. As a result, foreign substances such asdetergent bubbles and lint are discharged together with water remainingin the outer tub 6 as well as water absorbed into the laundry in theinner tub 8.

At this time, it is desirable that the step of dewatering during thewashing process be performed for a shorter time than a process ofdewatering the laundry as described below. The step of dewatering duringthe washing process will be referred to as a temporary dewatering step(S60).

After the temporary dewatering step, the process of washing the laundrycomprising the step of disentangling the laundry using the alpha-shapedwater stream according to the invention is completed.

Meanwhile, FIG. 1 is a diagram illustrating the general washing machine,and FIG. 6 is a flow diagram illustrating a rinsing process of thewashing machine according to the invention. The rinsing process of thewashing machine according to the invention is performed, which comprisesthe same steps of the washing process having the step of disentanglingthe laundry using the alpha-shaped water as described above, except thatdetergent-free rinsing water is supplied into the washing machine, andthat the temporary dewatering step is selectively performed.

The rinsing process of the invention comprises the steps of: supplyingdetergent-free rinsing water (S80); rinsing laundry using an agitatingwater stream (S82); disentangling the laundry using an alpha-shapedwater stream (S84); draining water to drain contaminated rinsing water(S86); and detecting an unbalance degree of the inner tub (S88), whichare sequentially performed in the same sequence as that of the washingprocess as described above. Additionally, according to a result of thestep of detecting the unbalance degree of the inner tub, the rinsingprocess of the invention further comprises the step of re-disentanglingthe laundry which is the same as that of the washing process describedabove (S87).

After finishing the rinsing process, the dewatering process isperformed, in which the inner tub 8 is rotated in one direction at ahigh speed such that the laundry m is dewatered by centrifugal force.

During the dewatering process, the pulsator 9 is rotated integrally withthe inner tub 8.

Particularly, unlike the temporary dewatering step during the washingprocess as described above, the dewatering process is performed in sucha manner that the inner tub 8 is rotated for a long period at a highspeed (for example, about 700 rpm), thereby allowing the laundry m to bedewatered (for example, to 50˜80% of water absorbed in the laundry) fornatural dry of the laundry m.

After finishing the dewatering process as described above, the washingoperation according to the washing method of the washing machine of theinvention is completed.

Meanwhile, it should be noted that the respective processes of thewashing method of the washing machine of the invention can beselectively performed by a user.

When the washing operation is finished without the dewatering processafter the rinsing process having the step of disentangling the laundryusing the alpha-shaped water stream of the invention, as described inFIG. 7, the rinsing process having the step of disentangling the laundryusing the alpha-shaped water stream may comprise the steps of: supplyingrinsing water as described above (S100); rinsing laundry (S102);disentangling the laundry (S104); draining water (S106); detecting anunbalance degree of the inner tub (S108); re-disentangling the laundry(S107); and temporary dewatering the laundry (S110), which is the sameas that of the washing process.

As apparent from the above description, with the washing method of thewashing machine according to the invention, the inner tub 8 is rotatedin one direction during the step of disentangling a laundry, so that thelaundry is completely forced against an inner wall of the inner tub 8,thereby enhancing the disentangling effect, compared with the effectwhen using the agitating water according to the prior art.

Additionally, with the washing method of the invention, the inner tub 8is rotated in one direction so as to form an alpha-shaped water streamduring the step of disentangling the laundry, so that the laundry ismore actively moved therein than when the laundry is disentangled usingthe agitating water according to the prior art, and so that watercentrifugally passes through the laundry after being raised in the outertub, thereby enhancing washing and rinsing effect as well as thedisentangling effect.

It should be understood that the embodiments and the accompanyingdrawings as described above have been described for illustrativepurposes and the present invention is limited by the following claims.Further, those skilled in the art will appreciate that variousmodifications, additions and substitutions are allowed without departingfrom the scope and spirit of the invention as set forth in theaccompanying claims.

1. A washing method of a washing machine, comprising the steps of:supplying water into the washing machine; forming an agitating waterstream by rotating at least one of an inner tub and a pulsator togenerate agitating force; and disentangling laundry by rotating theinner tub in one direction at a speed causing the laundry in the innertub to be forced against an inner wall of the inner tub by centrifugalforce while allowing the water to drop down into the inner tub afterbeing raised in the washing machine.
 2. The method as set forth in claim1, wherein at the step of supplying water, a detergent is selectivelyinput to the inner tub.
 3. The method as set forth in claim 1, whereinat the step of forming the agitating water stream, the laundry is washedby water containing the detergent, or is rinsed with detergent-freerinsing water.
 4. The method as set forth in claim 1, wherein at thestep of forming the agitating water stream, the inner tub is rotatedintegrally with the pulsator to generate the agitating force.
 5. Themethod as set forth in claim 1, wherein at the step of disentangling thelaundry, the inner tub is rotated at a speed of 80˜120 rpm.
 6. Themethod as set forth in claim 1, wherein at the step of disentangling thelaundry, the inner tub is rotated integrally with the pulsator in onedirection.
 7. The method as set forth in claim 1, further comprising:draining water after disentangling the laundry.
 8. The method as setforth in claim 7, further comprising: dewatering the laundry by rotatingthe inner tub in one direction at a speed causing water absorbed in thelaundry to be extracted by centrifugal force, after draining water. 9.The method as set forth in claim 8, wherein at the step of dewateringthe laundry, a rotating speed of the inner tub is higher than that ofthe inner tub at the step of disentangling the laundry.
 10. The methodas set forth in claim 8, further comprising: detecting an unbalancedegree of the inner tub between the step of draining water and the stepof dewatering the laundry, and wherein the step of dewatering thelaundry is performed if the unbalance degree of the inner tub is anacceptable degree.
 11. The method as set forth in claim 10, furthercomprising: if the unbalance degree of the inner tub is deviated fromthe acceptable degree, re-disentangling the laundry by rotating theinner tub in one direction at the same speed as that of the step ofdisentangling the laundry while being supplied with water, followed bydraining water; and re-detecting the unbalance degree of the inner tub.12. The method as set forth in claim 11, wherein at the step ofre-disentangling the laundry, the inner tub is rotated together with thepulsator in one direction.
 13. A washing method of a washing machine,comprising the steps of: supplying water into the washing machine;forming an agitating water stream by rotating at least one of an innertub and a pulsator to generate agitating force; disentangling laundry byintegrally rotating the inner tub and the pulsator in one direction at aspeed allowing the laundry in the inner tub to be forced against aninner wall of the inner tub by centrifugal force while allowing water todrop down into the inner tub after being raised in the washing machine;draining water; detecting an unbalance degree of the inner tub; and ifthe unbalance degree is in an acceptable degree, dewatering the laundryby rotating the inner tub in one direction at a speed causing waterabsorbed in the laundry to be extracted by centrifugal force.
 14. Themethod as set forth in claim 13, wherein at the step of supplying water,a detergent is selectively input to the inner tub.
 15. The method as setforth in claim 13, wherein at the step of forming the agitating waterstream, the laundry is washed by water containing the detergent, or isrinsed with detergent-free rinsing water.
 16. The method as set forth inclaim 13, wherein at the step of disentangling the laundry, a rotatingspeed of the inner tub is higher than that of the inner tub at the stepsof dewatering the laundry.
 17. The method as set forth in claim 13,further comprising: if the unbalance degree of the inner tub is deviatedfrom the acceptable degree, re-disentangling the laundry by rotating theinner tub in one direction at the same speed as that of the step ofdisentangling the laundry while being supplied with water, followed bydraining water; and re-detecting the unbalance degree of the inner tub.18. A washing method of a washing machine, comprising the steps of:supplying water into the washing machine; forming an agitating waterstream by rotating an inner tub and a pulsator at the same time at arelatively low speed to generate agitating force in order to allowlaundry to be washed or rinsed; disentangling the laundry by integrallyrotating the inner tub and the pulsator in one direction so as togenerate an alpha-shaped water stream; draining water; detecting anunbalance degree of the inner tub; and if the unbalance degree is anacceptable degree, dewatering the laundry by rotating the inner tub inone direction at a relatively high speed.
 19. The method as set forth inclaim 18, wherein at the step of disentangling the laundry, a rotatingspeed of the inner tub is lower than that of the inner tub at the stepof dewatering the laundry.
 20. The method as set forth in claim 18,further comprising: if the unbalance degree of the inner tub is deviatedfrom the acceptable degree, re-detecting the unbalance degree of theinner tub after re-disentangling the laundry.
 21. The method as setforth in claim 20, wherein the step of re-disentangling the laundrycomprises: re-supplying water; re-disentangling the laundry by rotatingthe inner tub and the pulsator in one direction at the same speed asthat of the step of disentangling the laundry; and draining water.